Nut-lock



C. FRITZ.

NUT LOCK. APPLICATION FILED APR. 15, 1920.

1,390,775. Patentedsept- 13,1921.

PATENT OFFICE.

CHARLES FRITZ, 0F BALTIMORE, MARYLAND.

NUT-LOCK.

Specification of Letters Patent.

Patented Sept. 13, 1921.

Application filed April 15, 1920. Serial No. 374,136.

To all whom it may concern:

Be it known that CHARLES FRITZ, a citizen of the United States, residingat Baltimore, in the State of Maryland, has invented certain new anduseful Improvements in Nut-Locks, of which the following is aspecification.

This invention relates to improvements in nut-locks and has reference toan improved device of this character whereby the nut may be wired andheld against rotation on the bolt.

The invention is illustrated in the accompanying drawing, wherein-Figure 1 shows the complete device in perspective as it appears when inuse.

Fig. 2 illustrates the device in longitudinal section.

Fig. 3 shows the same in top or plan view, and

Fig. 4 illustrates in perspective the detached washer plate.

Referring to the drawing the numeral 5,

. designates the bolt having a circumferentially screw-threaded body 6,with a head 7, at one end thereof, and at diametricallyopposite sidessaid bolt-body being provided with a longitudinally-extending groove 8and 9 respectively.

A passage or bore 10, is provided through the bolt-body from one groove8 to the opposite groove 9 thereof, said passage being located somewhatnear the head 7, as clearly shown in Fig. 2, of the drawing, all for apurpose presently to be explained.

The nut 11, employed is of the ordinary well-known form.

In connection with the special bolt and the ordinary nut, I employ awasher-plate 12, having a central opening 13, for the passage of thebolt and provided at its marginal edge with a series of perforations 14.In the present instance the marginal edge of the washer-plate has an upturned annular flange 15, with lugs 16, arranged at intervals around theperiphery of the same and the perforations 14, are formed in these lugs.

I further employ a tie or looking wire 17, which latter is carried bythe bolt, and as shown best in Fig. 2, of the drawing, this wire isfirst passed through the passage or' bore 10 of the bolt producing across-stretch l7, and the two ends 18 and 19 are bent back and laidrespectively in the longitudinal receive the wire ends so that a nut maybe screwed onto the bolt without contact with said ends. The normalposition of these prvire ends is illustrated by broken lines in Inoperation, presuming that the plates 20 and 21 are to be boltedtogether, the bolt 5, with the wire extending through the bore 10, andthe ends 18, 19 bent back into the grooves 8 and 9 of the bolt, will bepassed through the plates. The washerplate 12, will then be placed overthe threaded end of the bolt and the free ends of the concealedwire-ends until said plate seats on the upper side of plate 20.

The nut 11, will then be screwed down on the nut without engaging ordisturbing the wire-ends in the bolt grooves, until the nut is seatedfirmly in place against the washerplate.

Having now securely fastened the bolt in place by screwing the nut home,the wire ends 18-19 will be drawn down from the bolt grooves and theirfree ends passed through the nearest perforations let, in thewasher-plate. These wire ends are then drawn tightly down over the nutso as to firmly engage the latter and the free ends are bent at theouter sides of the lugs 16, so as to hold them in the taut conditionover the nut. By thus drawing the wire taut over the faces of the nut,the latter will be held against accidental rotation and therefore lockedwith respect to the bolt.

Having described my invention, I claim, The combination with a threadedbolt having longitudinal grooves at diametrically opposite sides andprovided with a cross passage through the bolt body from 9 CHARLESFRITZ.

